// Copyright 2018 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef V8_BUILTINS_BUILTINS_DATA_VIEW_GEN_H_
#define V8_BUILTINS_BUILTINS_DATA_VIEW_GEN_H_

#include "src/code-stub-assembler.h"
#include "src/elements-kind.h"
#include "src/objects/bigint.h"

namespace v8 {
namespace internal {

    class DataViewBuiltinsAssembler : public CodeStubAssembler {
    public:
        explicit DataViewBuiltinsAssembler(compiler::CodeAssemblerState* state)
            : CodeStubAssembler(state)
        {
        }

        TNode<Int32T> LoadUint8(TNode<RawPtrT> data_pointer, TNode<UintPtrT> offset)
        {
            return UncheckedCast<Int32T>(
                Load(MachineType::Uint8(), data_pointer, offset));
        }

        TNode<Int32T> LoadInt8(TNode<RawPtrT> data_pointer, TNode<UintPtrT> offset)
        {
            return UncheckedCast<Int32T>(
                Load(MachineType::Int8(), data_pointer, offset));
        }

        void StoreWord8(TNode<RawPtrT> data_pointer, TNode<UintPtrT> offset,
            TNode<Word32T> value)
        {
            StoreNoWriteBarrier(MachineRepresentation::kWord8, data_pointer, offset,
                value);
        }

        int32_t DataViewElementSize(ElementsKind elements_kind)
        {
            return ElementsKindToByteSize(elements_kind);
        }

        TNode<Uint32T> DataViewEncodeBigIntBits(bool sign, int32_t digits)
        {
            return Unsigned(Int32Constant(BigInt::SignBits::encode(sign) | BigInt::LengthBits::encode(digits)));
        }

        TNode<Uint32T> DataViewDecodeBigIntLength(TNode<BigInt> value)
        {
            TNode<Word32T> bitfield = LoadBigIntBitfield(value);
            return DecodeWord32<BigIntBase::LengthBits>(bitfield);
        }

        TNode<Uint32T> DataViewDecodeBigIntSign(TNode<BigInt> value)
        {
            TNode<Word32T> bitfield = LoadBigIntBitfield(value);
            return DecodeWord32<BigIntBase::SignBits>(bitfield);
        }
    };

} // namespace internal
} // namespace v8

#endif // V8_BUILTINS_BUILTINS_DATA_VIEW_GEN_H_
